Journal ArticleDOI
Cascaded DC-DC converter connection of photovoltaic modules
Geoffrey R. Walker,Paul Sernia +1 more
TLDR
In this paper, the authors proposed an alternative topology of nonisolated per-panel dc-dc converters connected in series to create a high voltage string connected to a simplified dc-ac inverter.Abstract:
New residential scale photovoltaic (PV) arrays are commonly connected to the grid by a single dc-ac inverter connected to a series string of pv panels, or many small dc-ac inverters which connect one or two panels directly to the ac grid. This paper proposes an alternative topology of nonisolated per-panel dc-dc converters connected in series to create a high voltage string connected to a simplified dc-ac inverter. This offers the advantages of a "converter-per-panel" approach without the cost or efficiency penalties of individual dc-ac grid connected inverters. Buck, boost, buck-boost, and Cu/spl acute/k converters are considered as possible dc-dc converters that can be cascaded. Matlab simulations are used to compare the efficiency of each topology as well as evaluating the benefits of increasing cost and complexity. The buck and then boost converters are shown to be the most efficient topologies for a given cost, with the buck best suited for long strings and the boost for short strings. While flexible in voltage ranges, buck-boost, and Cu/spl acute/k converters are always at an efficiency or alternatively cost disadvantage.read more
Citations
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Journal ArticleDOI
Step-Up DC–DC Converters: A Comprehensive Review of Voltage-Boosting Techniques, Topologies, and Applications
TL;DR: In this paper, the authors comprehensively review and classify various step-up dc-dc converters based on their characteristics and voltage-boosting techniques, and discuss the advantages and disadvantages of these voltage boosting techniques and associated converters.
Journal ArticleDOI
Intelligent PV Module for Grid-Connected PV Systems
TL;DR: This paper presents the intelligent PV module concept, a low-cost high-efficiency dc-dc converter with maximum power point tracking (MPPT) functions, control, and power line communications (PLC), and analyses the alternatives for the architecture of grid-connected PV systems: centralized, string, and modular topologies.
Journal ArticleDOI
Distributed Maximum Power Point Tracking of Photovoltaic Arrays: Novel Approach and System Analysis
TL;DR: A dc and small-signal ac model is derived to analyze steady-state behavior, as well as dynamics and stability, of the whole system, and simulation results are reported and discussed.
Journal ArticleDOI
Modular Cascaded H-Bridge Multilevel PV Inverter With Distributed MPPT for Grid-Connected Applications
TL;DR: In this article, a modular cascaded H-bridge multilevel photovoltaic (PV) inverter for single- or three-phase grid-connected applications is presented.
Journal ArticleDOI
Parallel-Connected Solar PV System to Address Partial and Rapidly Fluctuating Shadow Conditions
TL;DR: A portable solar PV system that effectively eliminates both of the aforementioned problems is described and proven and is capable of simultaneously maximizing the power generated by every PV cell in the PV panel.
References
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Book
Fuel cell systems explained
James Larminie,Andrew Dicks +1 more
TL;DR: In this paper, the first edition of this paper, the authors presented an analysis of fuel cell systems and their performance in terms of Molar Gibbs Free Energy Calculations (GFE) and Open Circuit Voltage.
Evaluating MPPT Converter Topologies Using a Matlab PV Model
TL;DR: In this paper, an accurate PV module electrical model based on the Shockley diode equation is presented, which has a photo-current current source, a single diode junction and a series resistance, and includes temperature dependences.
Journal ArticleDOI
Short-current pulse-based maximum-power-point tracking method for multiple photovoltaic-and-converter module system
TL;DR: In this paper, the authors proposed an adaptive MPPT algorithm for photovoltaic (PV) power generation systems based on a short-current pulse of the PV to determine an optimum operating current where the maximum output power can be obtained and completely differs from conventional hill-climbing-based methods.
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